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group_5 [2018/09/10 15:23] flowerdew |
group_5 [2018/09/13 16:18] flowerdew |
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* Used website to calculate θ< | * Used website to calculate θ< | ||
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- | ** ΔE/E = ~2% which is less than the 3.1% threshold so this also works.\\ | + | ** ΔE/E = ~2% which is less than the 3.1% threshold so this also works.\\ |
Question 5: | Question 5: | ||
* < | * < | ||
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+ | Question 6: | ||
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+ | * Plotting COSY beam size (x) and the quadrupole field strength(divided by aperture radius) and arrived at the graph below. Data doesn' | ||
+ | * Calculated emittance is about 0.3 mm mrad, which is 50% larger than the ' | ||
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+ | {{emittanceexample7.png}} | ||
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+ | Question 7: | ||
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+ | * Effective field length of Q2 was increased by 3% and the drift lengths either side were adjusted accordingly, | ||
+ | * The mass resolution was then optimised by minimising the function OBJ := 1/ | ||
+ | * This would increase the mass resolution to values of up to 85,000, however the emittance was very large. | ||
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+ | {{Group5_screen_shot_2018-09-13_at_16.02.21.png }} | ||
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+ | * We realised that we should alter our objective function, in order to re focus our beam. This was achieved with the function OBJ := 1/ | ||
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+ | {{Group5_screen_shot_2018-09-13_at_15.48.23.png }} | ||
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+ | * This optimisation improved the mass resolution from 640.86349 to 724.66207, while still focusing. {{: |